Pressure regulator block



FIG. 1 is a perspective view of a pressure regulator block according to a first embodiment of the invention;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a right view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken line portion of the figures is included to show unclaimed subject matter only and forms no part of the claimed design. 

CLAIM The ornamental design for a pressure regulator block, as shown and described. 